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Investment Components (Detail) - USD ($) $ in Millions | Mar. 31, 2020 | Jun. 30, 2019
--- | --- | ---
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | $ 125,311 |
Debt investments, Recorded Basis |  | 131,820 |
Derivative, net |  | 284 | $ 137
Cash and cash equivalents |  | 11,710 | 11,356
Short-term Investments |  | 125,916 | 122,463
Equity Investments |  | 2,660 | 2,649
Cash, cash equivalents, and investments |  | 140,286 | 136,468
Equity investments |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 3,899 | 3,058
Cash and cash equivalents |  | 1,239 | 409
Short-term Investments |  | 0 | 0
Equity Investments |  | 2,660 | 2,649
Equity investments | Other |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 2,473 | 2,085
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 0 | 0
Equity Investments |  | 2,473 | 2,085
Equity investments | Level 1 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 1,426 | 973
Cash and cash equivalents |  | 1,239 | 409
Short-term Investments |  | 0 | 0
Equity Investments |  | 187 | 564
Cash |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Cash |  | 4,583 | 3,771
Cash and cash equivalents |  | 4,583 | 3,771
Short-term Investments |  | 0 | 0
Equity Investments |  | 0 | 0
Derivatives, net |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Derivative, net | [1] | (16) | (13)
Cash and cash equivalents | [1] | 0 | 0
Short-term Investments | [1] | (16) | (13)
Equity Investments | [1] | 0 | 0
Debt investments |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 125,311 | 127,747
Debt investments, Unrealized Gains |  | 6,715 | 2,027
Debt investments, Unrealized Losses |  | (206) | (122)
Debt investments, Recorded Basis |  | 131,820 | 129,652
Cash and cash equivalents |  | 5,888 | 7,176
Short-term Investments |  | 125,932 | 122,476
Equity Investments |  | 0 | 0
Debt investments | Commercial Paper | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 5,164 | 2,211
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 5,164 | 2,211
Cash and cash equivalents |  | 1,442 | 1,773
Short-term Investments |  | 3,722 | 438
Equity Investments |  | 0 | 0
Debt investments | Certificates of deposit | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 2,446 | 2,018
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 2,446 | 2,018
Cash and cash equivalents |  | 1,984 | 1,430
Short-term Investments |  | 462 | 588
Equity Investments |  | 0 | 0
Debt investments | U.S. government securities | Level 1 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 96,481 | 104,925
Debt investments, Unrealized Gains |  | 6,543 | 1,854
Debt investments, Unrealized Losses |  | (13) | (104)
Debt investments, Recorded Basis |  | 103,011 | 106,675
Cash and cash equivalents |  | 496 | 769
Short-term Investments |  | 102,515 | 105,906
Equity Investments |  | 0 | 0
Debt investments | U.S. agency securities | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 2,124 | 988
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 2,124 | 988
Cash and cash equivalents |  | 458 | 698
Short-term Investments |  | 1,666 | 290
Equity Investments |  | 0 | 0
Debt investments | Foreign government bonds | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 7,255 | 6,350
Debt investments, Unrealized Gains |  | 3 | 4
Debt investments, Unrealized Losses |  | (13) | (8)
Debt investments, Recorded Basis |  | 7,245 | 6,346
Cash and cash equivalents |  | 1,476 | 2,506
Short-term Investments |  | 5,769 | 3,840
Equity Investments |  | 0 | 0
Debt investments | Mortgage- and asset-backed securities | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 3,952 | 3,554
Debt investments, Unrealized Gains |  | 16 | 10
Debt investments, Unrealized Losses |  | (37) | (3)
Debt investments, Recorded Basis |  | 3,931 | 3,561
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 3,931 | 3,561
Equity Investments |  | 0 | 0
Debt investments | Corporate notes and bonds | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 7,444 | 7,437
Debt investments, Unrealized Gains |  | 107 | 111
Debt investments, Unrealized Losses |  | (138) | (7)
Debt investments, Recorded Basis |  | 7,413 | 7,541
Cash and cash equivalents |  | 32 | 0
Short-term Investments |  | 7,381 | 7,541
Equity Investments |  | 0 | 0
Debt investments | Corporate notes and bonds | Level 3 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 49 | 15
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 49 | 15
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 49 | 15
Equity Investments |  | 0 | 0
Debt investments | Municipal securities | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 312 | 242
Debt investments, Unrealized Gains |  | 46 | 48
Debt investments, Unrealized Losses |  | (5) | 0
Debt investments, Recorded Basis |  | 353 | 290
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 353 | 290
Equity Investments |  | 0 | 0
Debt investments | Municipal securities | Level 3 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 84 | 7
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 84 | 7
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 84 | 7
Equity Investments |  | $ 0 | $ 0
[1] | Refer to Note 5 – Derivatives for further information on the fair value of our derivative instruments.

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